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Fetal acoustic stimulation testing. III. Predictive value of a reactive test
C V Smith1, J P Phelan, P Broussard
1Department of Obstetrics and Gynecology, University of Southern California School of Medicine and Women's Hospital, Los Angeles.
The Journal of Reproductive Medicine
|February 1, 1988
Summary
Acoustic stimulation during the nonstress test (NST) significantly reduces nonreactive results and testing time in high-risk pregnancies. This method maintains the predictive reliability of a reactive test for fetal well-being.
Area of Science:
- Maternal-Fetal Medicine
- Obstetric Ultrasound
- Fetal Monitoring
Background:
- The nonstress test (NST) is crucial for managing high-risk pregnancies.
- Fetal sleep cycles can cause nonreactive NST results, complicating assessments.
- Alternative methods are needed to improve NST efficiency and accuracy.
Purpose of the Study:
- To evaluate the efficacy of transabdominal acoustic stimulation in the NST.
- To determine if acoustic stimulation reduces nonreactive test rates and testing duration.
- To assess the impact of acoustically evoked reactive tests on perinatal outcomes.
Main Methods:
- Transabdominal acoustic stimulation was applied to fetuses during NST.
- The study compared nonreactive test rates, testing times, and predictive values.
- Intrapartum and neonatal outcomes were analyzed for deliveries within seven days of testing.
Main Results:
- Acoustic stimulation reduced nonreactive NST results by approximately 50%.
- Testing time was significantly shorter with the use of acoustic stimulation.
- Predictive reliability of a reactive test and perinatal outcomes remained unchanged.
Conclusions:
- Acoustic stimulation is a valuable adjunct to the NST in high-risk pregnancies.
- This technique improves NST efficiency by decreasing nonreactive tests and shortening duration.
- Acoustically stimulated reactive tests are as reliable as conventional NSTs for predicting fetal well-being.